First collected by A. A. Reznicek in Muskegon Co. in 2002 and probably overlooked; see Tatina & Reznicek (2010). This European annual resembles a miniature version of the cespitose, open-panicled native Agrostis species, such as A. scabra or A. perennans, but in addition to its annual habit, Aira differs in having conspicuous paleas usually more than 1 mm long and awned lemmas, whereas the paleas of the somewhat similar Agrostis species are absent or vestigial, and the lemmas are only rarely awned. It flowers early and disappears by mid-summer. Our plants are var. caryophyllea.